Device for curling threads made of cellulosic material at their issue from spinning machines



Sept. 22, 1931. M. DASSONVILLE 1,824,661

DEVICE FOR CURLING' THREADS MADE OF CELLULOSIC MATERIAL AT THEIR ISSUE FROM SPINNING MACHINES Filed June 8, 1929 INVENTOR Mztizel ,Dassonvlle I ATTO RNEYS Patented Sept. 22, 1931 PAT'E i/rI cHEnnnssoivviuiri, orrARIs, rannon nEvIcn non cunIiIne-mnREADs or GELLU OSICLMATERIAL AT rnurn' ISYUE FROM sriixnvrue'MAonjcnnsj- I A process is known for themanufacture of a cellulosic product having the appearance of wool, which consists insubjecting cellulose threads issuing from, a coagulation bathand 5 before their molecular stability is complete,

.to a reductionorsuppression' of the tension which must be exerted-on them for, pulling them out of the bath, andincompellingthem to retraction themselves; in order to give them a waved conformationhaving a certain anal ogy with that ofnatural wool.

Inorder to obtain, the wavings or curlings,

use is made ,of a scraper constituted by a movable metal blade. pressed by-theaction ,of

a-springagainst the winding up drum placed at the outlet of the coagulation bath; This scraper detachesinfact from the saidwinding up I drum, at. a suitable placcaand in a continuous, manner, the material in the-form of'a group ofthreads, by thus imparting to it a change ofdirection and a crimping or curling which gives it the desired appearance of naturalwool.

The face of the scraper against whichthe 2'5 material abuts, mustform .with the surface of the drum, on the side where this materia'larrives, an angle which may vary from A5 to 15Q, but which practically remains I between 100 and 1209,- Below 45,the mate-' rial, would tend -to accumulate in the angle formed by the drum and the scraper and the I operation would beidefective. At the curling producedis extremelyclose; it is less and less close, in proportionias the .angle. in-

the angle reaches 150; above 150 'no curling whateveris produced and the material is simply detached from the surface of the "1 creasesyitbecomes scarcely apparent when.

detaching beats used li 369,451; and inFrance October '30, 1928,

eration and regular detaching ofth artifi cialwool, q s a Besides it sometimes happens that the detached and waved material-follows'jthe detachingbladesby sticking on the samejduring a certain time,'-inst ea'dof constantly falling as soon as it; is detached; the pressingyby a'spring, of the 'blade against the drum isalso rendered very variable and very irregular owing to the action of the steam or of acids on this member which is, owing to its resiliency and to its relatively large surface, very sensitiveto theaction'of the various'external agents. v Theinvention which willbe described has for its object animprovedsystenr of, scraper which avoids the above mentioned inconveniences. I .i i Owing to theimprovementswhich will be described: I. -1 'j I v 1 a a (1) The scraper, in fact, always automatic ally presses against the drum in a rational and regular manner without havingto effect .itsadjustment.

A blunt edge, even slightly blunt, can t be nearly instantaneously .7 replacedby another onewithout any difliculty. Owing tOFltS shape and to=its special assemblagethe scrapernever stops the wool in itsadvance duringtheoperation. a

The accompanying drawings illustrate, by way ofexample; a form of constructionof the device in accordance with thepresent invention; V I Eig. lshows in elevation the scraper pressed againstthewinding up drum.

Fig.2 is-a plan view corresponding to Fig.

scale, of a detailo f construction; H

Fig. 4 illustrates the entiremachine and shows the position of the blade of the scraper on this machine;

a Fig. 5is'a detailview on an enlarged'scalc, showing the shape; and arrangement of the scraper. v

'The scraper device illustrated is composed of a metal scraper :1, the shape of which is so devised as to prevent artificial wool from sticking on'the sameafter curling.

u n" m F g. 3 1s a sectional v1ew,-on an enlarged I to I This scraper has a cross section in the shape of an equilateral triangle and its arrangement relatively to the winding up drum is such that e the angle a formed by'the front face of the ply and very rapidly remove and replace the scraper, provided,'-however, the abutment '9, to be mentioned later on, is previously manip: ulated. a

The fork 2 terminates iii'a socket which fits on the end of a rod 4 and is connected thereto through the medium of a pin'12 (Fig. 3).

The pin is forcibly fitted in the rod 4 and is rigid with the same, but the socket/of the fork 2, the hole of which has a very oval shape, on the contrary freely moves on the said pin inthetransverse direction, this allowing the fork '2 to rotate to a certain extent about the rod-4. This rotation of the fork limited to a few millimeters in each direction, is of the highest importance, considering it allows of pressing the scraper always very exactly on the winding up drum 3.

Therod 4 carrying the fork 2 slides in a support 5 and is secured thereto by a locking screw 14, this allowing the exact adjustment the winding up drum 3. i

of the point of application of the scraper on The support 5 is provided, on theother hand, with two trunnions rotating in bearings 6 secured on the sole member 7 so that if the said support which drives the whole struc ture is caused to rotate, the resilient application of the scraper on the winding updrum can be obtained; it results therefrom that the cellulosic material has no possibility of partly passing between the scraper and the drum and of sticking to the latter although it is'of very small thickness and in a very soft condition and this whatever may be the irregular'ities of the surface of the drum audits eventual excentricity. H

This resilient application of the scraper on the drum is obtained by means of a rider 10, urged by a counter-weight 11 which allows to adjust the pressure of thescraper onthe winding up drum. I

The entire structure rests through the medium of the sole member 7 on a bearing 8 secured to the cheeks 15 of the frame.

The abutment 9 already mentioned allows,

by being screwed home, of lifting the rod 4 and of holding the scraper-carrying fork spaced from the winding up drum during the replacement and turning over thescraper.

blade-carry- 7 From the above description, the following advantages are obviously obtained:

(1) The scraper, owing to its triangular cross section with perfectly defined angles, allows the artificial wool in proportion as it is detached from. the winding up drum, to move away by always preserving its wavings and without ever sticking to the scraper.

(2) The scraper is removable and can be easily replaced, when it is necessary to sharp en it-or to change it-for any reason. I i

(3) The shape of the scraper allows moreover to successively utilize its three edges by simply displacing it on its support.

(4) The scraper-carrying for being movable and capable of rocking aboutan axis situated in the plane passing in the mean circle of the drum, allows the cutting edge of the scraper to fit exactly on the periphery of the winding up drum. 7 V

' (5) The resilient application of the scraper on the winding up drum: being effected "by a counterweight controlled rider, is not influenced by the action of external agents;

Claims: I

' 1.v In a machine for spinning c'ellul osic products and having a rotary drum serving to pull the threads when they issue'from the coagulationbath. the combination of a lever said drum, this lever having an end in't'he shape of a trunnion, asocket freely mounted on this end oft-the lever so as to be capable of rocking according to a small angle about'its axis. this socket being terminated by a forked portion. a scraper of prismatic shape mounted in the said forked portion and adapted to bear by one of its edges against the surface of the said winding up drum. and a counter-;

weight adiustable on thesaid lever. adapted to press the said scraper against the drum.

2. In a machine for spinning cellulosic products and having a'rotarv drum serving to pull the thre ds when they issue from the rocking about an axisparallel to that of the said drum: a forkedniece-mounted on this lever so as to be capable of rockini about an axis orthogonal to" that of. the drum, the branches of this forked piece having triangular recesses. a scraper in the shape of a triangular prism, the ends of which are fitted in the said recesses, and adapted to bear by one of its edges against the surface of the drum,

and a counter-weight adjustable on thelever,

adapted to, press the said scraper against this lever about an axis at right angle to the rocking about an axis parallel to that of the 11110 COfifllllfltlOl'l baththe. combination of a lever axis of the drum, a counterweight on the said lever adapted to press the said scraper against the drum, and a screw adapted to pushthe said lever back against the action of the said r counterweight.

In testimony whereof I have hereunto affixed my signature.

MICHEL DASSONVILLE; 

